var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
// 引入路由
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
let topicRouter = require('./routes/topic')
let orderRouter = require('./routes/order')
let uploadRouter = require('./routes/upload')
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
// 跨域
var allowCrossDomain = function (req, res, next) {
  // 设置允许跨域访问的请求源（* 表示接受任意域名的请求）   
  res.header("Access-Control-Allow-Origin", "*");
  // 设置允许跨域访问的请求头
  res.header("Access-Control-Allow-Headers", "X-Requested-With,Origin,Content-Type,Accept");
  // 设置允许跨域访问的请求类型
  res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    // 配置允许前端请求头添加Authorization来进行身份认证
    res.header("Access-Control-Allow-Headers", "Authorization");
  // 同意 cookie 发送到服务器（如果要发送cookie，Access-Control-Allow-Origin 不能设置为星号）
  res.header('Access-Control-Allow-Credentials', 'true');
 next();
};
app.use(allowCrossDomain);
// 配置路由
app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/topic', topicRouter)
app.use('/order', orderRouter)
app.use('/file', uploadRouter)
// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  if (err.name=='UnauthorizedError') {
    res.status(401).json({
      code:0,
      message:"身份认证失败",
      error:err
    })
  }else{
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
  
    // render the error page
    res.status(err.status || 500);
    res.render('error');
  }
 
});

// module.exports = app;
app.listen(8080,()=>{
  console.log("后端服务器启动,http://127.0.0.1:8080/");
})